# Starting Synctool causes "Unable to check supported versions"

When you start the Zivver Synctool, the following error appears:

> Unable to check supported versions

Your internet connection is working correctly.

## Cause

The automatic update of the Zivver root certificate did not start.

## Solution

Enable the setting that automatically updates root certificates on the server. Set this registry key:

`HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\SystemCertificates\AuthRoot` ``"DisableRootAutoUpdate"=dword:00000000``

Updated on 2025-11-12